Conference Review 2019 (Part 1)
In the last two months, I had the pleasure to speak at four different conferences. Each of them was unique in its own way, and all of them were definitely worth to attend. Of course, it is not possible to write down all impressions in…
Running utPLSQL Tests in SQL Developer
Introduction In November 2017 Jacek Gebal asked me if I could help to integrate utPLSQL into SQL Developer. In January 2018 we released the first MVP. Tests were executed in a new SQL Developer worksheet showing the result in the script output pane.This was easy…
Oracle Privilege Analysis in action
As Oracle has quite recently announced that Privilege Analysis is now included with the Oracle Database Enterprise Edition licence, I played a little bit with this cool feature to solve infamous ORA-01031: Insufficient privileges error. You can read results of my investigation in the article…
Bitmap-based COUNT(DISTINCT) Functions in Oracle 19c
Oracle 19c provides a set of new SQL functions for bitmap operations. They allow fast computation of COUNT(DISTINCT) expressions. What is the purpose of these functions? The Oracle documentation is very sparse, but at least it tells us that the main focus are Materialized Views on…
Using DBMS_DEBUG in SQL Developer
Do you need to debug PL/SQL units in SQL Developer? You can’t get it to work because someone refuses to open TCP ports between your database and your client? No problem. You can still configure the good old DBMS_DEBUG in your SQL Developer. I know…
Cross-endian Oracle migration – moving user data – part II
In my previous post I shared some findings on migrating user and application data between platforms with different endianness, focusing on problems with reducing downtime. Today I’ll talk more about the complexity of chosen method. It’s not only about complexity per se, it’s rather about…
Cross-endian Oracle migration – moving user data – part I
One can find a lot of sources and materials regarding migrating Oracle databases between platforms having different endianness, even though the choice of possible methods is limited in this case. On paper (slides?) everything looks fine, but then you hit bugs or environment-specific problems. Moreover,…
20 Years Working for Trivadis
Today, it is exactly twenty years ago since I started my job as a consultant for Trivadis. In 1999, I never thought that I will stay in one company for such a long time. A retrospective of the last two decades. On 1st March 1999, a…
Materialized View Refresh for Dummies
Materialized Views are often used in data warehouses to improve query performance on aggregated data. But what if it takes too long to refresh the materialized views? Here are some basic rules to improve refresh performance. Unlike indexes, materialized views are not automatically updated with…
MemOptimized RowStore in Oracle Database 19c
Since February, 13 2019 Oracle Database 19c is available. I blogged about this feature here and here. Time for an update. So, what’s new in 19c regarding the MemOptimized Rowstore? Fast Lookup Works with JDBC Thin Driver I listed 16 prerequisites for the MemOptimized Rowstore in this…
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